Engine System:
Engine assembly, disassembly, lubrication, cooling, fuel delivery, ignition, emissions, and diagnostics for Twin Cam 88B and potential Twin Cam 96 variants.
Transmission Drivetrain:
Gearbox (5-speed Cruise Drive), clutch, primary drive, final drive (belt drive system), troubleshooting, and overhaul procedures.
Chassis Suspension:
Frame, front fork (e.g., Showa or similar), rear shock absorbers, wheel bearings, steering head bearings, and suspension adjustments.
Electrical System:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), ignition system, lighting, instrumentation, starter system, security system (H-D Smart Security System), and troubleshooting.
Braking System:
Front and rear brake systems (calipers, master cylinders, rotors, brake pads), hydraulic system bleeding, and maintenance.
Fuel System:
Fuel tank, fuel lines, fuel pump, fuel injectors (for fuel-injected models), carburetor (for carbureted models, though less common for 2006 Softail), and throttle control.
Bodywork Trim:
Fenders, fuel tank, seat, exhaust system, fairings (if applicable), saddlebags (if equipped), and related trim components.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment (if applicable, though most Softails are belt-driven), tire pressure checks, brake fluid checks, and general inspection points.
Troubleshooting:
Diagnostic procedures for common issues, fault code interpretation (if applicable to the diagnostic system), and step-by-step troubleshooting guides for various systems.
Repair Overhaul:
Detailed instructions for component removal, installation, disassembly, inspection, and reassembly for major motorcycle systems.
Technical Specifications:
Torque specifications for fasteners, clearances, fluid capacities, electrical resistance values, and dimensional data.
Suspension Adjustment:
Procedures for adjusting front fork preload (if applicable) and rear shock absorber settings.
Wheel Tire Service:
Instructions for removing and installing wheels, tire mounting/dismounting, balancing, and checking tire wear.
Electrical Troubleshooting:
Detailed troubleshooting charts, wiring diagrams, and component testing procedures for electrical system faults.
Engine Component Rebuild:
Detailed disassembly, inspection, and reassembly procedures for major engine components such as cylinder heads, pistons, crankshaft, and valve train.
Depth:
Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers everything from basic service to major component overhauls and diagnostics.
Diagnostic Tools:
Mentions or implicitly assumes the use of specialized tools and diagnostic equipment common in Harley-Davidson service centers.
Engine Type:
Harley-Davidson Twin Cam 88B (for most models) or potentially Twin Cam 96 (introduced in some 2007 models, but check specific model variants).
Engine Configuration:
45-degree V-twin, air-cooled.
Displacement:
Twin Cam 88B: 1450cc (88 cubic inches); Twin Cam 96: 1584cc (96 cubic inches).
Horsepower:
Typically in the range of 65-70 HP (estimates, actual figures vary by specific model and tuning).
Torque:
Typically in the range of 85-95 lb-ft (estimates, actual figures vary by specific model and tuning).
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI) or Carburetor (CV carburetor) depending on the specific Softail model and region.
Ignition Type:
Electronic Ignition (single-fire, crank-position sensor based for ESPFI).
Primary Oil Change:
Every 2,500 miles or 6 months, whichever comes first (check manual for exact specification).
Engine Oil Change:
Every 5,000 miles or 12 months, whichever comes first (check manual for exact specification).
Transmission Clutch Oil Change:
Typically at 10,000 mile intervals (check manual).
Engine Oil Type:
Harley-Davidson recommends specific viscosities and API classifications. For 2006, commonly 20W-50 or 10W-40 depending on climate. Harley-Davidson SYN3 or equivalent is often recommended.
Primary Oil Type:
Harley-Davidson Primary Chain Case Lubricant or equivalent.
Transmission Oil Type:
Harley-Davidson Formula+ Transmission and Primary Chain Case Lubricant or equivalent.
Brake Fluid Type:
DOT 4 brake fluid.
Cam Chain Tensioner:
Early Twin Cam models (pre-2007) had plastic cam chain tensioners that could wear and fail, potentially leading to engine damage. Upgrade to hydraulic tensioners is a common modification.
Starter Clutch:
Some models may experience starter clutch wear, leading to a grinding noise or failure to crank the engine.
Crankshaft Position Sensor:
Failure of the crankshaft position sensor can cause the engine to stall or not start.
Fuel Line Leaks:
While less common, inspection of fuel lines and fittings for leaks is always prudent.
Harley Davidson Legacy:
Founded in 1903, Harley-Davidson is an iconic American motorcycle manufacturer with a long history of producing V-twin engines and cruiser-style motorcycles.
Softail Introduction:
The Softail platform was introduced in 1984, revolutionizing cruiser design with its hidden rear suspension.
Twin Cam Era:
The 2006 model year is firmly within the Twin Cam era, which began in 1999, representing a significant evolution in Harley-Davidson's engine technology.
Manufacturing Location:
Primarily manufactured in Milwaukee, Wisconsin, and York, Pennsylvania, USA.